PHP提供了两套函数与Oracle连接，分别是ORA_和OCI函数。其中ORA_函数略显陈旧。OCI函数更新据说更好一些。两者的使用语法几乎相差无几。你的PHP安装选项应该可以支持两者的使用。下面学步园小编来讲解下怎样用PHP连接Oracle数据库?
怎样用PHP连接Oracle数据库
连接
< ?if($conn=Ora_Logon("user@TNSNAME","password")) {echo"SUCCESS!Connectedtodatabase\n"; }else {echo"Failed:-(Couldnotconnecttodatabase\n";} Ora_Logoff($conn); phpinfo(); ?>
以上代码使用TNSNAME(在你的tnsnames.ora文件中指明)定义的Oracle数据库名称、用户名称和密码连接数据库。在成功连接的基础上，ora_logon函数返回一个非零的连接ID并储存在变量$conn中。
查询
假设与数据库已经连接就绪，下面我们就来实际的应用对数据库的查询。下面的代码演示了一个连接并查询的典型例子：
functionprintoraerr($in_cur)
{
//检查Oracle是否出错
//如果存在错误则显示
//当指针被激活时每次请求Oracle后调用该函数
if(ora_errorcode($in_cur))
echo"Oraclecode-".ora_error($in_cur)."\n";
return;
}
if(!($conn=ora_logon("user@TNSNAME","password")))
{echo"Connectiontodatabasefailed\n";
exit;
}
echo"Connectedasconnection-$conn\n";
echo"Openingcursor...\n";
$cursor=ora_open($conn);printoraerr($cursor);
echo"Openedcursor-$cursor\n";
$qry="selectuser,sysdatefromdual";
echo"Parsingthequery$qry...\n";
ora_parse($cursor,$qry,0);printoraerr($cursor);
echo"Queryparsed\n";
echo"Executingcursor...\n";
ora_exec($cursor);printoraerr($cursor);
echo"Executedcursor\n";
echo"Fetchingcursor...\n";
while(ora_fetch($cursor))
{
$user=ora_getcolumn($cursor,0);printoraerr($cursor);
$sysdate=ora_getcolumn($cursor,1);printoraerr($cursor);
echo"row=$user,$sysdate\n";
}
echo"Fetchedallrecords\n";
echo"Closingcursor...\n";
ora_close($cursor);
echo"Closedcursor\n";
echo"Loggingofffromoracle...\n";
ora_logoff($conn);
echo"Loggedofffromoracle\n";
?>
怎样用PHP连接Oracle数据库
显示结果
以下代码演示了怎样查询数据库并将结果输出：
functionprintoraerr($in_cur,$conn)
{
//检查Oracle是否出错
//如果存在错误则显示
//当指针被激活时每次请求Oracle后调用该函数
//Ifitencounteredanerror,weexitimmediately
if(ora_errorcode($in_cur))
{echo"Oraclecode-".ora_error($in_cur)."n";
ora_logoff($conn);
exit;
}
return;
}
functionexequery($w_qry,$conn)
{
$cursor=ora_open($conn);printoraerr($cursor,$conn);
ora_parse($cursor,$w_qry,0);printoraerr($cursor,$conn);
ora_exec($cursor);printoraerr($cursor,$conn);
$numrows=0;
$w_numcols=ora_numcols($cursor);
//显示头部
echo"\n";
for($i=0;$i<$w_numcols;$i++) { $align=(ora_columntype($cursor,$i)=="NUMBER")?"RIGHT":"LEFT"; echo"\t".ora_columnname($cursor,$i)."\n"; } echo"\n"; while(ora_fetch($cursor)) { echo"\n"; for($i=0;$i<$w_numcols;$i++) { $align=(ora_columntype($cursor,$i)=="NUMBER")?"RIGHT":"LEFT"; if(ora_columntype($cursor,$i)=="LONG") echo"". ora_getcolumn($cursor,$i)."\n"; else echo"".ora_getcolumn($cursor,$i)."\n"; printoraerr($cursor,$conn); } $numrows++; echo"\n"; } if($numrows==0) echo"Queryreturnednorecords\n"; else { echo"\n"; echo"Count\n"; echo"$numrows\n"; echo"\n"; } echo"\n"; ora_close($cursor); return; } //主程序 if(!($conn=ora_logon("user@SID","password"))) { echo"Error:Cannotconnecttodatabase\n"; exit; } $qry="SELECT deptno\"Dept\" ,empno\"Emp\" ,empnm\"Name\" ,salary\"Salary\" FROM employee ORDERBY1,2"; exequery($qry); ora_logoff($conn); ?>
基于HTTP的Oracle登录
将以下代码加在PHP页面代码之前以确认Oracle登录。注意你必须正确设定$SID。
if(!isset($PHP_AUTH_USER))
{
Header("WWW-authenticate:basicrealm=\"$SID\"");
Header("HTTP/1.0401Unauthorized");
$title="LoginInstructions";
echo"
Youarenotauthorizedtoenterthesite
\n";
exit;
}
else
{
if(!($conn=ora_logon("$PHP_AUTH_USER@$SID",$PHP_AUTH_PW)))
{Header("WWW-authenticate:basicrealm=\"$SID\"");
Header("HTTP/1.0401Unauthorized");
$title="LoginInstructions";
echo"
Youarenotauthorisedtoenterthesite
\n";
exit;
}}
?>
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